The experiment ongoing...
Celery after about a day in red dye
Before and after cross section of the celery. The celery was in blue dye in this case.
Cactus in blue dye
After a day or so there was one red dot in the middle of the cactus.
The flower used in the experiment. It only went very slightly red on the edges.
This flower did a better job of changing color. Red on the edges.